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  <div class="section" id="numpy-ma-masked-array-setfield">
<h1>numpy.ma.masked_array.setfield<a class="headerlink" href="#numpy-ma-masked-array-setfield" title="Permalink to this headline">¶</a></h1>
<p>method</p>
<dl class="method">
<dt id="numpy.ma.masked_array.setfield">
<code class="sig-prename descclassname">masked_array.</code><code class="sig-name descname">setfield</code><span class="sig-paren">(</span><em class="sig-param">val</em>, <em class="sig-param">dtype</em>, <em class="sig-param">offset=0</em><span class="sig-paren">)</span><a class="headerlink" href="#numpy.ma.masked_array.setfield" title="Permalink to this definition">¶</a></dt>
<dd><p>Put a value into a specified place in a field defined by a data-type.</p>
<p>Place <em class="xref py py-obj">val</em> into <em class="xref py py-obj">a</em>’s field defined by <a class="reference internal" href="numpy.ma.masked_array.dtype.html#numpy.ma.masked_array.dtype" title="numpy.ma.masked_array.dtype"><code class="xref py py-obj docutils literal notranslate"><span class="pre">dtype</span></code></a> and beginning <em class="xref py py-obj">offset</em>
bytes into the field.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>val</strong><span class="classifier">object</span></dt><dd><p>Value to be placed in field.</p>
</dd>
<dt><strong>dtype</strong><span class="classifier">dtype object</span></dt><dd><p>Data-type of the field in which to place <em class="xref py py-obj">val</em>.</p>
</dd>
<dt><strong>offset</strong><span class="classifier">int, optional</span></dt><dd><p>The number of bytes into the field at which to place <em class="xref py py-obj">val</em>.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>None</strong></dt><dd></dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<p><a class="reference internal" href="numpy.ma.masked_array.getfield.html#numpy.ma.masked_array.getfield" title="numpy.ma.masked_array.getfield"><code class="xref py py-obj docutils literal notranslate"><span class="pre">getfield</span></code></a></p>
</div>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="n">x</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">eye</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span><span class="o">.</span><span class="n">getfield</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">float64</span><span class="p">)</span>
<span class="go">array([[1.,  0.,  0.],</span>
<span class="go">       [0.,  1.,  0.],</span>
<span class="go">       [0.,  0.,  1.]])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span><span class="o">.</span><span class="n">setfield</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">int32</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span><span class="o">.</span><span class="n">getfield</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">int32</span><span class="p">)</span>
<span class="go">array([[3, 3, 3],</span>
<span class="go">       [3, 3, 3],</span>
<span class="go">       [3, 3, 3]], dtype=int32)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span>
<span class="go">array([[1.0e+000, 1.5e-323, 1.5e-323],</span>
<span class="go">       [1.5e-323, 1.0e+000, 1.5e-323],</span>
<span class="go">       [1.5e-323, 1.5e-323, 1.0e+000]])</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span><span class="o">.</span><span class="n">setfield</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">eye</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span> <span class="n">np</span><span class="o">.</span><span class="n">int32</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">x</span>
<span class="go">array([[1.,  0.,  0.],</span>
<span class="go">       [0.,  1.,  0.],</span>
<span class="go">       [0.,  0.,  1.]])</span>
</pre></div>
</div>
</dd></dl>

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